3CW20,000A7

      The 3CW20,000A7 is a high-mu power triode intended to be used as a zero bias Class B amplifier in audio or radio frequency applications. Operation with zero-grid bias offers circuit simplicity by eliminating the bias supply. In addition, grounded grid operation is attractive since a power gain as high as twenty times can be obtained. The 3CW20,000A7 is electrically identical to the aircooled 3CX10,000A7 except for its 20kW plate dissipation rating.
      Here you can get some information about the characteristics of 3CW20,000A7.The plate dissipation (Max.) is 20,000 Watts.The grid dissipation (Max.) is 500 Watts.The frequency for Max. rating (CW) is 110 MHz.The amplification factor is 200.It uses thoriated tungsten filament/cathode.Voltage is 7.5 Volts.Current is 99.0 Amps.Then is about the capacitance of grounded cathode.Input is 59.0 pf.Output is 0.2 pf.Feedthrough is 36 pf.Next is about the capacitance of grounded grid.Input is 59.0 pf.Output is 36 pf.Feedthrough is 0.2 pf.The cooling system uses water and forced air.Base selects coaxial.The air socket uses SK-1300.The inner length is 11.22 mm and the whole is 285.00 mm.The inner diameter 4.65 mm and the outer diameter is 118.10 mm.The weight is 11.5 lb (5.2 kg).